113921 has 2 divisors, whose sum is σ = 113922. Its totient is φ = 113920.

The previous prime is 113909. The next prime is 113933. The reversal of 113921 is 129311.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (113909) and next prime (113933).

It can be written as a sum of positive squares in only one way, i.e., 87025 + 26896 = 295^2 + 164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113921 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113921.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 113921.

It is not a weakly prime, because it can be changed into another prime (113021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56960 + 56961.

It is an arithmetic number, because the mean of its divisors is an integer number (56961).

2¹¹³⁹²¹ is an apocalyptic number.

It is an amenable number.

113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

113921 is an equidigital number, since it uses as much as digits as its factorization.

113921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 17.

The square root of 113921 is about 337.5218511445. The cubic root of 113921 is about 48.4768728082.

The spelling of 113921 in words is "one hundred thirteen thousand, nine hundred twenty-one".